/*
 * Copyright 2012-2018 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package cn.springcloud.gray.bean.properties.bind.validation;

import org.springframework.util.Assert;

/**
 * Error thrown when validation fails during a bind operation.
 *
 * @author Phillip Webb
 * @author Madhura Bhave
 * @see ValidationErrors
 * @see ValidationBindHandler
 * @since 2.0.0
 */
public class BindValidationException extends RuntimeException {

    private final ValidationErrors validationErrors;

    BindValidationException(ValidationErrors validationErrors) {
        super(getMessage(validationErrors));
        Assert.notNull(validationErrors, "ValidationErrors must not be null");
        this.validationErrors = validationErrors;
    }

    /**
     * Return the validation errors that caused the exception.
     *
     * @return the validationErrors the validation errors
     */
    public ValidationErrors getValidationErrors() {
        return this.validationErrors;
    }

    private static String getMessage(ValidationErrors errors) {
        StringBuilder message = new StringBuilder("Binding validation errors");
        if (errors != null) {
            message.append(" on " + errors.getName());
            errors.getAllErrors().forEach(
                    (error) -> message.append(String.format("%n   - %s", error)));
        }
        return message.toString();
    }

}
